Natural gas futures for August delivery fell more than 8 percent...

Natural gas futures for August delivery fell more than 8 percent Thursday, marking their biggest one-day drop in nearly a year, according to Nathan Golz, researcher at Wachovia Securities in St. Louis. Prices for the key heating, cooking and power generation fuel have tumbled more than 20 percent since their peak before the Fourth of July, and are now trading at their lowest point since April.